A high pressure (systolic) of 115mmHg is considered normal, and a low pressure (diastolic) of 59mmHg is an abnormal condition, which is on the low side.
In the resting state, the normal range of systolic blood pressure is 90~139mmHg, the normal range of diastolic blood pressure is 60~89mmHg, if the diastolic blood pressure is 59mmHg, it is a low state.
If the diastolic blood pressure is 59mmHg, it is low. It is possible that the measurement error is caused by the body position, so you can measure it again, and if it is within the normal range, there is no abnormality. If the diastolic blood pressure is on the low side after several measurements, then it may be low blood pressure.
It is recommended that the patient go to the hospital in time to find out the cause, heart failure, trauma, heart valve disease and so on may cause low blood pressure, if it is caused by disease, it is recommended to treat the primary disease in time.